Granted Patent
Utility
US 4,474,913 · App. 06/484,743
Polyvinylchloride processing
Inventor:
Robert A. Lindner
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: Apr 14, 1983
Inventor
Robert A. Lindner
Assignee (at issue)
Henkel Limited
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.